Help.
Today when I went out to my house construction, I saw that condensation had formed on the top side of the diffusion plastic in the vestibule
What could be the cause?
I have been meticulous with the plastic and taped all the seams.
The roof is a shed roof with the construction seen from the inside.
28x70 Battens
Plastic
260mm insulation
25mm air gap
Tongue and groove
Underlay felt
Standing seam roof
Today when I went out to my house construction, I saw that condensation had formed on the top side of the diffusion plastic in the vestibule
What could be the cause?
I have been meticulous with the plastic and taped all the seams.
The roof is a shed roof with the construction seen from the inside.
28x70 Battens
Plastic
260mm insulation
25mm air gap
Tongue and groove
Underlay felt
Standing seam roof
Assuming you mean condensation on the insulation side of the plastic. Indicates that it's colder in the house than in the insulation. Haven't turned on any heating yet? It can be like this at this time of year when the sun is shining and it's cold indoors. Building moisture can also contribute.
I've only had some construction heating around 10 degrees this winter.
I haven't seen any condensation until now at Easter when it got warmer outside.
The roof is facing south so it probably gets warm.
Do you think it will resolve when proper heating and ventilation are installed, or should I take some measures?
I haven't seen any condensation until now at Easter when it got warmer outside.
The roof is facing south so it probably gets warm.
Do you think it will resolve when proper heating and ventilation are installed, or should I take some measures?
I wouldn't worry. A construction like this is designed for it to be warmer on the inside. If it's the opposite, you can get condensation on the wrong side of the plastic. This is why plastic is usually not recommended in unheated buildings.
Possibly, it's a bit surprising that the warm air comes down through the insulation and can condense on the plastic. I think the heat should be insulated away in that direction as well. But on a south side with blazing sun and a metal roof, the wind (just an air gap here, I assume) can get insanely warm, so maybe it's not that strange.
Possibly, it's a bit surprising that the warm air comes down through the insulation and can condense on the plastic. I think the heat should be insulated away in that direction as well. But on a south side with blazing sun and a metal roof, the wind (just an air gap here, I assume) can get insanely warm, so maybe it's not that strange.
I have placed a construction fan in the hallway and am starting to see the condensation dry up. So it's probably just as you said, it was much colder inside now when the spring sun is warming. Thank you very much for your explanation, I was a bit worried that something was wrong.